CVE-2026-63524: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds read in Microsoft Office within Microsoft 365 Apps for Enterprise. It enables an unauthorized attacker to disclose information locally by reading memory outside the intended bounds. The vulnerability has a CVSS 3.1 base score of 5.5, indicating medium severity. Microsoft has published an official fix and manages remediation for this cloud service. No known exploits are reported in the wild.
Potential Impact
An unauthorized attacker can exploit this vulnerability to disclose sensitive information locally on affected systems. There is no impact on integrity or availability. The attack vector requires local access with user interaction.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages the remediation server-side. Users and administrators should ensure their Microsoft 365 Apps for Enterprise are updated according to the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63524.
CVE-2026-63524: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Description
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVSS v3.1
Score 5.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds read in Microsoft Office within Microsoft 365 Apps for Enterprise. It enables an unauthorized attacker to disclose information locally by reading memory outside the intended bounds. The vulnerability has a CVSS 3.1 base score of 5.5, indicating medium severity. Microsoft has published an official fix and manages remediation for this cloud service. No known exploits are reported in the wild.
Potential Impact
An unauthorized attacker can exploit this vulnerability to disclose sensitive information locally on affected systems. There is no impact on integrity or availability. The attack vector requires local access with user interaction.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages the remediation server-side. Users and administrators should ensure their Microsoft 365 Apps for Enterprise are updated according to the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63524.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-16T22:05:22.741Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63524","vendor":"Microsoft"}]
Threat ID: 6a7b5826bf8831d539156274
Added to database: 08/11/2026, 17:13:10 UTC
Last enriched: 08/11/2026, 20:43:25 UTC
Last updated: 08/12/2026, 01:21:05 UTC
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.